M16C80 Datasheet, PDF (279/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
28. Electrical characteristics
Memory expansion Mode and Microprocessor Mode Vcc=3V
Refresh Timing (CAS before RAS refresh)
BCLK
RAS
td(BCLK-RAS)
25ns.max
tsu(CAS-RAS)*1
CASL
CASH
DW
td(BCLK-CAS)
25ns.max
*1:It depends on operation frequency.
tsu(CAS-RAS)=(tcyc/2-25)ns.min
tcyc
th(BCLK-RAS)
0ns.min
th(BCLK-CAS)
0ns.min
Refresh Timing (Self-refresh)
BCLK
RAS
CASL
CASH
DW
td(BCLK-RAS)
25ns.max
tsu(CAS-RAS)*1
td(BCLK-CAS)
25ns.max
*1:It depends on operation frequency.
tsu(CAS-RAS)=(tcyc/2-25)ns.min
Measuring conditions
• VCC=3V±10%
• Input timing voltage
:Determined with VIH=1.5V, VIL=0.5V
• Output timing voltage
:Determined with VOH=1.5V, VOL=1.5V
tcyc
th(BCLK-RAS)
0ns.min
th(BCLK-CAS)
0ns.min
Figure 28.25 VCC=3V timing diagram (11)
Rev.1.00 Aug. 02, 2005 ^{Page 268} of 329
REJ09B0187-0100